PSEUDACHATINA. 211 



very oblique, white within; outer lip broadly expanded and 

 re flexed, widely brown-bordered. Columella and parietal cal- 

 lous opaque-white, the latter not noticeably thinned out near 

 the outer lip. Length 92, diam. 35, oblique length of aper- 

 ture 38 mm. 



West Africa. 



This form does not appear to be referable to any of the 

 described species or varieties, but perhaps stands nearest 

 Kobelt's P. d. pyramidata. It is named for Dr. Wm. Kobelt, 

 whose monograph of Pseudackatina has been quoted freely 

 in the present work. 



6. P. DENNISONI Pfeiffer. PL 7, fig. 40. 



Shell ovate-conic, rather solid, sculptured with strong, dis- 

 tant folds with smaller ones interposed, roseate under a de- 

 ciduous tawny epidermis, generally ornamented with black- 

 ish triangular streaks and an interrupted sutural band. Spire 

 conic, the apex obtuse, blackish; suture undulating, not mar- 

 gined. Whorls iy 2 , moderately convex, the last swollen above, 

 subcarinate below the middle, blackish. Columella com- 

 pressed, white, twisted. Aperture oblique, sinuate-oval, the 

 peristome thin, narrowly expanded, margins joined by a white 

 callous. Length 77, diam. 32, aperture 32 mm. (P/V.). 



Gabun (Cuming coll.). 



Bulimus downesii REEVE, C. Icon., v, pi. 29, f. 1776. 

 Pseudachatina dennisoni PFR., Malak. Bl., iii, 1856, p. 257 ; 

 Monogr., iv, p. 597. P. d. Pfr. et var. connectens D'AILLY, 

 Bihang, p. 92, pi. 4, f. 1-3 (1896). 



Reeve's figure of a specimen in the Dennison coll., which 

 Pfeiffer refers to his species, is reproduced on pi. 7, f. 40. 

 D'Ailly gives the name connectens to a series of shells inter- 

 mediate between dennisoni and sodeni. 

 6a. Var. CONNECTENS d'Ailly. PL 3, figs. 11, 12, 13. 



Upper whorls and apex flesh-colored, peristome flesh or 

 roseate, or sometimes white, the columella pure white; rest 

 of the shell of a more or less deep rose, brown, or nearly 

 white. The suture is usually margined by an impressed line. 

 The last whorl may be rounded, as in Reeve's figure (denni- 



